Buildings

Buildings are the foundation of your empire. Each building automatically produces gold per second (GPS). The empire unlocks from Chapter 2.

Your buildings keep producing while you are offline, by default for up to 8 hours. The skill Diligent Sleepers and VIP levels extend that.

Overview

#	Building	Starting price	Base GPS	Cost factor
1	Monster Den	10	0.1	×1.065
2	Gold Mine	100	1.0	×1.08
3	Magic Tower	500	5.0	×1.095
4	Dragon Keep	5,000	50	×1.11
5	Ancient Temple	50,000	500	×1.125
6	Mebularium	500,000	5,000	×1.14
7	Crystal Grotto	5,000,000	50,000	×1.16
8	Cloud Fortress	50,000,000	500,000	×1.18
9	Forge of Fate	500,000,000	5,000,000	×1.20
10	Cosmic Nexus	5,000,000,000	50,000,000	×1.22

Cost growth is tiered

Each purchase of a building makes the next copy more expensive by its own cost factor (not a flat ×1.15). Cheap buildings like the Monster Den grow slowly (×1.065), expensive ones like the Cosmic Nexus quickly (×1.22). So you reach very high counts with cheap buildings.

A building unlocks the next one once you own 50 of it. Building 50 of your 5th building (Ancient Temple) also unlocks prestige. Every building can be expanded up to 1,000, which is where all milestones end.

Milestones (per building, multiply globally)

Once a single building reaches a certain count, its production is multiplied. The bonuses stack cumulatively.

Count	Bonus	Cumulative
10	×2.0	×2
25	×2.0	×4
50	×2.0	×8
100	×2.0	×16
150	×1.5	×24
200	×1.5	×36
250	×1.5	×54
300	×1.5	×81
400	×1.5	×122
500	×2.0	×243
600	×1.5	×365
700	×1.5	×547
800	×1.5	×821
900	×1.5	×1,231
1000	×2.0	×2,461

Super milestones (per building)

Super milestones apply per building and stack on top of the normal milestones. From 250 on, every further threshold adds ×6, so even a cheap building stays competitive at high counts.

Count	Bonus	Cumulative
25	×2	×2
100	×3	×6
250	×6	×36
350	×6	×216
450	×6	×1,296
500	×6	×7,776
600	×6	×46,656
700	×6	×279,936
800	×6	×1.68M
900	×6	×10.1M
1000	×6	×60.5M

Tip

The thresholds from 250 on sit close together, and each one adds ×6. Push a building past the next threshold on purpose instead of spreading your purchases thin. A single pushed building no longer dominates everything though, the top buildings share the output.

Global empire milestones (total of all buildings)

A separate bonus track rewards the sum of all buildings. It multiplies your entire gold production. This is a strong incentive to mass-build lots of (especially cheap) buildings.

Total count	Bonus	Cumulative
250	×1.25	×1.25
500	×1.25	×1.56
1,000	×1.5	×2.34
1,500	×1.5	×3.52
2,000	×1.75	×6.15
3,000	×2	×12.3
4,000	×2	×24.6
5,000	×2.25	×55.4
7,500	×2.5	×138
10,000	×2.5	×346

With 10 buildings at 1,000 each, 10,000 is the highest reachable total, so the track ends there.

Other GPS sources

Your gold per second does not hang on buildings alone:

Source	Effect
Prestige multiplier	permanent, from your earned prestige points (see Prestige)
Collection bonus	Every Mebuli you own grants a GPS bonus by rarity (see Mebulis)
Prestige tree	up to ×255 via the economy nodes
Construction Mastery (skill)	+8 % per level
Guild research	Gold vein, +2 % per level
VIP level	permanently up to +20 %
Gold rush	temporarily ×2, ×5, ×10, ×25 or ×50

Spending gold

Gold is the one currency that keeps growing practically without limit in the endgame. Accordingly there are several sinks:

Sink	Details
Buildings	the main sink, up to 1,000 per building
Energy upgrades at the bazaar	two upgrades with 20 levels each: +25 max energy or +8 % regeneration rate per level; costs rise super-exponentially
Guild donation	1 % of your lifetime gold per day

Strategy

• Early: Build Monster Dens until the Gold Mine is affordable, then prioritize the most expensive building you can buy.
• Mid: Keep an eye on milestone thresholds, the missing buildings up to the next ×2 bonus can double your GPS.
• Late: The Auto-Builder skill extends your build sessions up to 4 hrs 20 min, and the prestige tree multiplies your GPS massively. The Build Advisor always shows you which purchase pays off most right now.